On-line Conveyor Belt System
MS1510 Moisture Transducer
____Solution for On-line Moisture Measurement for Powder and Grain Applications
Ref:sMS1510IntE
Date:2006-03-26
The MS1510B Microwave Moisture Monitor allows accurate measurement of moisture in real time using a microwave moisture technique. This technique is applicable to a wide range of conducting materials including coal, bauxite, wood flake, sugar, bagasse, mineral sands, food, chemicals and others.
The Microwave Moisture Measurement Technique.
The moisture content of the material is determined by measuring the transmission of a microwave beam through the process material. This beam is emitted from a transmitter located in one side of sample, always at the lower arm of the System Frame located under the conveyor belt. The transmitted microwave signal is detected by the receiver located in another side, always at the upper arm of the System Frame. The effect on the microwave signal by the material it passes through is recorded and used in the determination of the moisture content.
Flow Density Compensation embedded
l Flunctuation of flow rate heavily influence the detect results in this technology. It always needs a certain way to monitor the cross density of the sampling flow as well, so that the exact moisture result could be calculated on time.
l There are 3 density rectifying technology can be selected by user application situation.
l For sample space and flow stable conveyor, vonveyor speed test can be used
l Conveyor bottom is smooth sliding, US distance test can be used
l Unstable conveyor,flow system, g-ray density transducer must be choosed.
l Continuosly measurement of moisture in the sand, concrete, calcareous sandstone or glass industries
l Determination of the moisture of coke and sinter mixtures
l Other solid/powder industries
l Rapid realtime results
l
Continuous measurement of moisture content on-belt
frame construction
Non contact technique, simple installation in or on existing tanks or vessels
l Independent of the temperature, pressure, pH value and color of the material
l Large measuring volume, ensuring a better, more representative measured value
l User set up
l No segregation effects and low cost, straightforward installation
l No wear problems, low maintenance
l Allows proactive process control
l No costly sampling program and no operator intervention
l Elementary commissioning and "Two point" calibration
Measurement Frame
The measurement On-belt frame houses the measurement systems - the microwave transmitter and receiver. The measurement systems are accurately aligned during the manufacturing process which means that there is no need for lengthy setting up on site. The Measurement Frame is normally arranged so that these measurement systems are aligned with the centre of the belt. The Measurement Frame is designed to fit directly to the conveyor stringers.
The lower arm of the Measurement Frame contains the microwave transmitter. The upper arm of the Measurement Frame contains; the microwave receiver, the microwave electronics as well as STIM processor.
Electronic Transducer
l The standard MS1510B is supplied with the Electronics Control Cabinet mounted on the Measurement Frame. This cabinet contains electrical, electronic and microwave hardware which consists of:
l
STIM Processor
Power supplies.
Electrical terminations.
Microwave Components
Display Panel and terminal.
Specifications
Operational |
|
Conveyor width |
Up to 1400mm as standard (more than 1400mm requires customised Onbelt frame) |
Conveyer Speed |
No limit |
Material Top Size |
Typically up to 500mm (material dependent) |
Bed Depth Range |
Typically 20mm to 500mm ((material dependent) |
Moisture range |
0 - 80% |
Measurement Update Time |
Typically 1 minute (user configurable, dependent on process requirements) |
Instrument precision |
Typically 0.3% at 1 standard deviation (ultimate precision achievable 0.1%) |
Electrical Requirements |
|
Field Unit (Independent system) |
24V DC, Max < 300W supply |
Remote Controller (Optional) |
220 or 110 V ACt, single phase, <2 amp supply |
Environmental Requirements |
IP65 |
Operating temperature range |
0 to 45°C with protection from direct sun and rain |
Humidity |
0 to 95% relative (non-condensing) |
Outputs |
|
Instantaneous moistures |
Isolated 4 to 20 mA current loops indicating the rolling average of moisture content over any accumulated time period. |
System running |
Relay closure indicating that no alarm conditions exist |
Shipping mass |
150 kg |
For more special solid/powder moisture mearurement application system,please refer to sMSpowdIntE “Solution for Powder Moisture Test Applications”